Homework

This is a part of the homework feature of my blog, which is an ongoing conversation with my mate S.F.

I said I found a microscope cheaper on AliExpress than on Amazon, but actually I was wrong about that. In fact I found it cheaper on eBay ($333.29) than Amazon ($733.42). Nevertheless, my point stands. It pays to shop around!

I mentioned my video jj5 feels hardcore!. Let me know if that doesn’t play for you, I think I have the original kicking around somewhere… If this video doesn’t make you happy, nothing will… :)

You told me about Louis Theroux’s Weird Weekends.

The I-can’t-believe-it’s-not-satire lawyer/jailer thing I mentioned is documented here: Um, America?

The academic accident I referred to was in The Hardware Lottery by Sara Hooker published in August 2020. In the essay the author says “risk adverse”. Of course the idiomatic expression she is aiming at is “risk averse” and she just got it horribly wrong. Not once, but twice. As I said, for a professional academic ignorance at this scale is… unbecoming.

My comment about academic whinging was: “There’s nothing more sleep inducing than a pompous academic having a whinge.” (If I could refer you to section three of the policy document, subsection five, article three A, there is a discrepancy regarding some thing I do not give a shit about…)

I mentioned How It Works (girls suck at math!)

The full quote is: “‘Why?’ is a stupid boring question to which all honest answers are a deception of the mind.” — John Elliot V

I mentioned Creative Act: A Way of Being by Rick Rubin. I will bring you your copy next time I see you. :) In the mean time you might enjoy: Rick Rubin: Legendary Music Producer | Lex Fridman Podcast #275.

Don’t forget to send me the name of the Sony headphones you recommend.

The LCD Soundsystem you mentioned was You Wanted A Hit. Classic.

Let’s not forget: It doesn’t have to be a bad thing!

Also, let’s not forget: everything you do is indelibly wrought in space and time. (No pressure.)

Also: hope is not a strategy. (Although some do not agree)

What is the difference between hope and faith?

Hope:

  • To wish for a particular event that one considers possible.
  • To have confidence; trust.
  • To desire and consider possible: synonym: expect.

Faith:

  • The assent of the mind to the truth of a proposition or statement for which there is not complete evidence; belief in general.
  • Specifically Firm belief based upon confidence in the authority and veracity of another, rather than upon one’s own knowledge, reason, or judgment; earnest and trustful confidence: as, to have faith in the testimony of a witness; to have faith in a friend.
  • In a more restricted sense: In theology, spiritual perception of the invisible objects of religious veneration; a belief founded on such spiritual perception.

Serendipity and The Three Princes of Serendip.

I have a note about “deesterous”, but I have no idea what that means. What were we talking about? I think I wrote it down phonentically, but the search engine is telling me “dexterous”, but that is not it.

Also we were talking about “flapping around in affluence”. What was that all about? Lost to time?

We discussed the Spectacle. More reading may be required, particularly of Jean Baudrillard.

The string theory guy is Michio Kaku. I’m worried he might be a crank. Or maybe he is brilliant. Who could say. I watched a video of him recently: Michio Kaku | Quantum Supremacy | Talks at Google.

AI and the paperclip problem is described here. The problem is if you design an AI to make paperclips it might destroy civilization. Because, to begin with, it might sense that humans might try to turn it off, which would impede its ability to create paperclips, so it wipes out humanity and uses the atoms of our bodies to make paperclips… I mean, it is *very good* at making paperclips.

We mentioned Experimental Jet Set, Trash and No Star. Classic. On the web here.

The Chillout Sessions began back in 2001. They don’t make ’em like they used to.

The concept of enshittification is explained by Cory Doctorow in Tiktok’s enshittification.

I mentioned about Musk feigning thought in an interview I watched recently. Check this out. He totally pretends to think deeply about the question! It’s awful to watch, like bad acting!

I mentioned the video game Descent. I remember playing it back in the nineties, it was so cool! I think there is Descent, Descent II, and Decent 3. Apparently I can get them all on Steam. Gonna try that. Want to get myself a good joystick to go with them, maybe this Logitech G 4021846 H.O.T.A.S. RGB Throttle and Stick Controller X56.

You asked what brings me joy, it is this:

Love you brother. Can’t wait to see you again soon. <3

Op amp tester

I was watching How To TEST OP AMPS Using A Multimeter vs Op-Amp Tester Project Single Dual and I learned about this Operational Amplifier OP AMP Tester For Single Dual OPAMP TL071 TL072 TL081 TL082 Single/Dual Op Amp Test Board.

I have to cool it on the spending for a little while, but I’ve made a note of this on my shopping list.

Thermal imager FTW

I was just poking about with my new thermal imagers and I found one of my power bricks was warm, while the one next to it, on the right, was not. Turned out the one on the right wasn’t plugged in properly! It was supposed to be powering a USB hub, but the hub was bus powered, not mains powered, and I couldn’t tell. I mean, all of the lights were on, and the power brick was plugged in, so I hadn’t suspected anything. If I hadn’t made this discovery with my thermal camera I would probably never have learned that my USB hub was unpowered. I could very well have run into problems with devices plugged into it being under powered, and I would never have known why.

Unboxing #3: Unboxing of UNI-T UTi260B Thermal Imager with Macro Lens | In The Lab With Jay Jay

This post is part of my video blog and you can find more information about this video on this show’s homepage which is here.

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video I unbox my new UNI-T UTi260B thermal imager with macro lens and compare it with my Noyafa NF-521 thermal imager.

I made a few mistakes with the production of this video, sorry about that. I made a mess of the side branding, I will have that fixed in future. And I managed to get my toes on camera. The height of professionalism!

In this video I refer to my lab equipment documentation. Particularly I mention the Jackcat Mini Cutter electric scissors.

Note: in the video I’m not sure what “ROI” means, but it turns out it means “region of interest”. The region of interest is a box in the middle of the display, and some settings apply to this area.

Thanks very much for watching! And please remember to hit like and subscribe!


Following is a product I use picked at random from my collection which may appear in my videos. Clicking through on this to find and click on the green affiliate links before purchasing from eBay or AliExpress is a great way to support the channel at no cost to you. Thanks!

Yum Cha Heavy Duty Stainless Steel Wire BrushThis is an image of the product.notes

Let’s go shopping!

Philips QT4022

This evening I was working on a battery replacement for a Philips QT4022 hair trimmer for my friend. They don’t seem to make this model any more, it was hard to find useful info about them. I made some notes over here. In the end I accidentally released the magic smoke, but at least I got some practice using my soldering iron and my microscope (this evening I learned how to take photos with my microscope and transfer them to my computer, haven’t done that before).

I did start off making a video about this, but it all went very badly, so I’m not gonna be publishing that one. :P

I learned a few lessons:

  1. take photos of the circuit board before you take to it with a soldering iron. This is so that if you damage the circuit board or the silk screen you can still read the component markings on the photo even if you damage the board.
  2. use the max current and max voltage settings on the power supply and don’t exceed sensible values for those. (200mA for DC motor is a sensible limit, 6A is not.)
  3. if you’re dealing with a circuit that has batteries soldered in, and you’re attempting to desolder the batteries, you need to be careful the solder doesn’t melt and create a short circuit, because it can, and it will.

My soldering skills are pretty poor at the moment. What I need is lots of practice. I’m not sure what the best tips or the best temperatures are yet. I accidentally lifted some SMD components because I used too much heat too close to them.

RIP Philips trimmer.